(* Signature tests -- should print nothing *)

module type S = sig
  type t
  val f : int -> t
  val g : t -> int
end

module A = struct
  type t = int
  let f = (+) 1
  let g = (+) 1
end

module B : S = A
module C : S = A

let f (x: int) = A.f (A.g x)
let f (x: int) = A.g (A.f x)
let f (x: A.t) = A.f (A.g x)
let f (x: A.t) = A.g (A.f x)
let f (x: int) = B.g (B.f x)
let f (x: B.t) = B.f (B.g x)
let f (x: int) = C.g (C.f x)
let f (x: C.t) = C.f (C.g x)